package com.zyt.ssss.interceptor;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Enumeration;

/**
 * @author zyt
 * @createDate 2020/05/14 11:50 PM
 */
public class LoginIntercepter implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        Cookie[] cookies = request.getCookies();
//        for (Cookie cookie : cookies) {
//            if (cookie.getName().equals("loginStatus") && cookie.getValue().equals("admin")) {
//                return true;
//            }
//        }
//        response.sendRedirect("/login.jsp");
//        return false;
        HttpSession session = request.getSession();
        System.out.println("==========>>>>sessionId:" + session.getId());
        System.out.println("======SESSION::::" + session);

        Enumeration<String> attrs = session.getAttributeNames();
// 遍历attrs中的
        while(attrs.hasMoreElements()){
// 获取session键值
            String name = attrs.nextElement().toString();
            // 根据键值取session中的值
            Object vakue = session.getAttribute(name);
            // 打印结果
            System.out.println("------" + name + ":" + vakue +"--------\n");

        }

        System.out.println("===============>>>>>>当前uri：" + request.getRequestURI());
        Object username = session.getAttribute("username");
        System.out.println("=================>>>>>username:" + username);
        if(username == null) {
            // 没有登录,重定向到登录页
            System.out.println("未登录，请登录");
            response.sendRedirect(request.getContextPath() + "/login.jsp");
            return false;
        }else{
            System.out.println("已登录，放行请求");
            // 已登录，放行
            return true;
        }
    }
}
